Lots of changes

1 files changed, 34 insertions, 0 deletions

diff --git a/webAO/services/request.js b/webAO/services/request.js
new file mode 100644
index 0000000..f21f881
--- /dev/null
+++ b/webAO/services/request.js
@@ -0,0 +1,34 @@
+/**
+ * Make a GET request for a specific URI.
+ * @param {string} url the URI to be requested
+ * @returns response data
+ * @throws {Error} if status code is not 2xx, or a network error occurs
+ */
+ const request = async url => {
+    return new Promise((resolve, reject) => {
+      const xhr = new XMLHttpRequest();
+      xhr.responseType = 'text';
+      xhr.addEventListener('error', () => {
+        const err = new Error(`Request for ${url} failed: ${xhr.statusText}`);
+        err.code = xhr.status;
+        reject(err);
+      });
+      xhr.addEventListener('abort', () => {
+        const err = new Error(`Request for ${url} was aborted!`);
+        err.code = xhr.status;
+        reject(err);
+      });
+      xhr.addEventListener('load', () => {
+        if (xhr.status < 200 || xhr.status >= 300) {
+          const err = new Error(`Request for ${url} failed with status code ${xhr.status}`);
+          err.code = xhr.status;
+          reject(err);
+        } else {
+          resolve(xhr.response);
+        }
+      });
+      xhr.open('GET', url, true);
+      xhr.send();
+    });
+  }
+  export default request
\ No newline at end of file